National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The present study was conducted to determine genotypic variations for normalized difference vegetation index (NDVI) and canopy temperature (CT) in wheat under terminal heat and combined heat and drought stresses. Forty-four wheat genotypes were evaluated under late sown with irrigation (heat stress) and without irrigation (combined heat and drought stress) in an environment with average temperatures of 28.6°C during the growing season and 30.62°C during the grain filling stage. Moisture under heat stress range from 14.84 to 19.12 % whereas under combined stress it was 5.08 to 10.49 %. The mean grain yield was 106.7 and 123.4 gm/ plot under heat stress and combined stress respectively. The mean CT 24.1 and 29.40C was under heat stress and combined stress respectively. The mean NDVI 0.57 and 0.50 under heat stress and combined stress respectively. Overall, under combined stress there was a 13 %decrease in NDVI, 18% increase in the CT and 13.5% increase in the yield than the heat stressed genotypes. The negative correlation between NDVI and yield whereas positive correlation between CT and grain yield under combined stress. The NDVI and CT are the two physiological traits to measure high yielding genotypes under combined stress.
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